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/*****************************************************************************
* Copyright (c) 2010, 2014, 2018 CEA LIST and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
* Christian W. Damus (CEA) - 402525
* Christian W. Damus (CEA) - bug 417409
* Ansgar Radermacher (CEA) - Bug 540815
*
*****************************************************************************/
package org.eclipse.papyrus.uml.tools.databinding;
import org.eclipse.core.databinding.observable.ChangeEvent;
import org.eclipse.core.databinding.observable.IChangeListener;
import org.eclipse.core.databinding.observable.IObservable;
import org.eclipse.core.databinding.observable.IObserving;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.observable.value.ValueDiff;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.UnexecutableCommand;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.papyrus.infra.tools.databinding.AggregatedObservable;
import org.eclipse.papyrus.infra.tools.databinding.CommandBasedObservableValue;
import org.eclipse.papyrus.infra.tools.databinding.ReferenceCountedObservable;
import org.eclipse.papyrus.uml.tools.Activator;
import org.eclipse.papyrus.uml.tools.commands.SetMultiplicityCommand;
import org.eclipse.papyrus.uml.tools.helper.UMLDatabindingHelper;
import org.eclipse.papyrus.uml.tools.util.MultiplicityParser;
import org.eclipse.papyrus.uml.tools.utils.MultiplicityElementUtil;
import org.eclipse.uml2.uml.MultiplicityElement;
import org.eclipse.uml2.uml.UMLPackage;
/**
* An ObservableValue for manipulating the UML Multiplicity property.
* Multiplicity is a simple, virtual property, aggregating both lowerBound and upperBound,
* and presenting them as an Enumeration with 4 values : 1, 0-1, 0-*, 1-*
*
* The values are edited with commands executed on the given editing domain.
* These commands will probably only work in a Papyrus context.
*
* @author Camille Letavernier
*
* @deprecated since 4.3
* use {@link org.eclipe.papyrus.uml.properties.databinding.MultiplicityObservableValue} instead
*
* This class Will be removed in Papyrus 5.0, see bug 540829
*/
@Deprecated
public class MultiplicityObservableValue extends ReferenceCountedObservable.Value implements IChangeListener, CommandBasedObservableValue, AggregatedObservable, IObserving {
private IObservableValue lowerBound, upperBound, lowerValue, upperValue, lowerValueSpecification, upperValueSpecification;
private EStructuralFeature lowerFeature, upperFeature;
private EObject eObject;
private EditingDomain domain;
/**
* Constructor.
*
* @param eObject
* The EObject which the multiplicity is being edited
* @param domain
* The Editing Domain on which the commands will be executed
*/
public MultiplicityObservableValue(EObject eObject, EditingDomain domain) {
this.eObject = eObject;
this.domain = domain;
lowerFeature = UMLPackage.eINSTANCE.getMultiplicityElement_Lower();
upperFeature = UMLPackage.eINSTANCE.getMultiplicityElement_Upper();
EStructuralFeature lowerValueFeature, upperValueFeature, lowerValueSpecificationFeature, upperValueSpecificationFeature;
lowerValueFeature = UMLPackage.eINSTANCE.getMultiplicityElement_LowerValue();
upperValueFeature = UMLPackage.eINSTANCE.getMultiplicityElement_UpperValue();
lowerValueSpecificationFeature = UMLPackage.eINSTANCE.getLiteralInteger_Value();
upperValueSpecificationFeature = UMLPackage.eINSTANCE.getLiteralUnlimitedNatural_Value();
lowerBound = UMLDatabindingHelper.getObservableValue(eObject, lowerFeature, domain);
upperBound = UMLDatabindingHelper.getObservableValue(eObject, upperFeature, domain);
lowerValue = UMLDatabindingHelper.getObservableValue(eObject, lowerValueFeature, domain);
upperValue = UMLDatabindingHelper.getObservableValue(eObject, upperValueFeature, domain);
lowerValueSpecification = getValueSpecification(lowerValue, lowerValueSpecificationFeature, domain);
upperValueSpecification = getValueSpecification(upperValue, upperValueSpecificationFeature, domain);
lowerValue.addChangeListener(this);
upperValue.addChangeListener(this);
if (lowerValueSpecification != null) {
lowerValueSpecification.addChangeListener(this);
}
if (upperValueSpecification != null) {
upperValueSpecification.addChangeListener(this);
}
}
private IObservableValue getValueSpecification(IObservableValue source, EStructuralFeature specificationFeature, EditingDomain domain) {
if (source.getValue() == null) {
return null;
}
return UMLDatabindingHelper.getObservableValue((EObject) source.getValue(), specificationFeature, domain);
}
/**
* @see org.eclipse.core.databinding.observable.IChangeListener#handleChange(org.eclipse.core.databinding.observable.ChangeEvent)
*
* @param event
*/
@Override
public void handleChange(ChangeEvent event) {
boolean fireChange = false;
if (event.getSource() == lowerValue || event.getSource() == upperValue) {
fireChange = true;
IObservableValue<?> newLowerVS = getValueSpecification(lowerValue, UMLPackage.eINSTANCE.getLiteralInteger_Value(), domain);
IObservableValue<?> newUpperVS = getValueSpecification(upperValue, UMLPackage.eINSTANCE.getLiteralUnlimitedNatural_Value(), domain);
// handle case that property has initially no value specification for upper and lower (bug 540815)
if (newLowerVS != lowerValueSpecification) {
if (lowerValueSpecification != null) {
lowerValueSpecification.removeChangeListener(this);
}
lowerValueSpecification = newLowerVS;
if (lowerValueSpecification != null) {
lowerValueSpecification.addChangeListener(this);
}
}
if (newUpperVS != upperValueSpecification) {
if (upperValueSpecification != null) {
upperValueSpecification.removeChangeListener(this);
}
upperValueSpecification = newUpperVS;
if (upperValueSpecification != null) {
upperValueSpecification.addChangeListener(this);
}
}
}
if (event.getSource() == lowerValueSpecification || event.getSource() == upperValueSpecification) {
fireChange = true;
}
if (fireChange) {
final Object value = getValue();
fireValueChange(new ValueDiff() {
@Override
public Object getOldValue() {
return null; // Unknown
}
@Override
public Object getNewValue() {
return value;
}
});
}
}
@Override
public Object getObserved() {
return eObject;
}
@Override
public synchronized void dispose() {
lowerValue.removeChangeListener(this);
upperValue.removeChangeListener(this);
if (lowerValueSpecification != null) {
lowerValueSpecification.removeChangeListener(this);
lowerValueSpecification.dispose();
}
if (upperValueSpecification != null) {
upperValueSpecification.removeChangeListener(this);
upperValueSpecification.dispose();
}
lowerValue.dispose();
upperValue.dispose();
lowerBound.dispose();
upperBound.dispose();
super.dispose();
}
@Override
public Object getValueType() {
return String.class;
}
@Override
protected String doGetValue() {
String result = null;
if (eObject instanceof MultiplicityElement) {
result = MultiplicityElementUtil.formatMultiplicityNoBrackets((MultiplicityElement) eObject);
} else {
int upper, lower;
upper = lower = 0;
Object lowerValue = lowerBound.getValue();
Object upperValue = upperBound.getValue();
lower = (Integer) lowerValue;
upper = (Integer) upperValue;
result = MultiplicityParser.getMultiplicity(lower, upper);
}
return result;
}
@Override
protected void doSetValue(Object value) {
Command command = getCommand(value);
domain.getCommandStack().execute(command);
}
@Override
public Command getCommand(Object value) {
String val = (String) value;
int[] lowerUpper = MultiplicityParser.getBounds(val);
if (lowerUpper == null || lowerUpper.length < 2) {
return UnexecutableCommand.INSTANCE; // Invalid multiplicity
}
int lower = lowerUpper[0], upper = lowerUpper[1];
if (MultiplicityParser.isValidMultiplicity(lower, upper)) {
try {
return new SetMultiplicityCommand((MultiplicityElement) eObject, val);
} catch (Exception ex) {
Activator.log.error(ex);
}
}
return UnexecutableCommand.INSTANCE;
}
@Override
public AggregatedObservable aggregate(IObservable observable) {
try {
return new AggregatedPapyrusObservableValue(domain, this, observable);
} catch (IllegalArgumentException ex) {
return null; // The observable cannot be aggregated
}
}
@Override
public boolean hasDifferentValues() {
return false;
}
}
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